Panna cotta is a classic Italian dessert, traditionally made from cream and milk set with gelatin, which isn’t vegetarian. The gelatin is what makes it different from flan (set with eggs) or pudding (set with starch and sometimes eggs).
The best panna cotta is ultra-creamy and just barely set — it should have a distinct wiggle to it. So the challenge in making a vegetarian panna cotta is to replace the gelatin with something that doesn’t make a brittle, crumbly, or over-firm gel. Agar, derived from seaweed, can make a good panna cotta if you are careful to use the bare minimum amount.
Agar is relatively easy to find. The brand I like best is Telephone — it comes in little packets that you can find at Asian groceries or on Amazon.com. I find this brand to be completely flavorless, and the thickening strength is very reliable. If you try other brands, or agar flakes etc., you may have to experiment to find the equivalent amount.
Whenever you use agar it’s important to disperse it before hydrating. The best technique is to whisk it in with sugar or another powdered ingredient, disperse it into a vortex of liquid in the blender, and only then do you heat it. If you try to heat it, which causes the powder to hydrate, before fully dispersing it, you’ll have a clumpy mess on your hands.
With panna cotta you have the choice of serving it in ramekins or unmolding it. Obviously ramekins are the safest choice, but if you want to unmold, it’s best to use metal or silicone molds to aid in the release. Dipping the base of the mold in hot water for a few seconds before drying and inverting on a plate may aid in release.
Caramelized Banana and Buttermilk Panna Cotta
For the bourbon brown sugar syrup
3/4 cup water
3/4 cup dark brown sugar
6 Tbs. good-quality bourbon (Maker’s Mark or better)
Bring all ingredients to a simmer in a small saucepan. Simmer 5 minutes. Strain and reserve in refrigerator.
For the caramelized banana and buttermilk panna cotta
3 overripe bananas, peeled (430 grams peeled weight)
2 cups buttermilk
1 cup heavy cream
1/2 tsp. pure vanilla extract
1/4 tsp. salt
1/3 cup brown sugar
1/4 cup white sugar
1 tsp. Telephone brand agar agar powder (check if you need kosher, but other brands’ strength may vary)
Gather 8 ramekins, pudding cups, or whatever you want to serve the panna cotta in onto a baking sheet that will fit in your refrigerator.
Preheat oven to 400º. Put bananas on a parchment line baking sheet and roast until very well browned and bubbling, about 30 minutes, mashing with a fork a couple of times throughout to expose more surface area.
Put bananas, buttermilk, cream, vanilla, salt, and brown sugar in a blender and blend on high speed for 2 minutes.
Whisk together white sugar and agar in a small bowl. With the blender on medium speed, remove the top and sprinkle the sugar-agar mix into the vortex. Put the cover back on and blend on high speed for 2 more minutes.
Strain the mixture through your finest sieve into a saucepan. Heat at medium, whisking frequently until it comes to a simmer. Immediately remove from heat and transfer to the ramekins. Place on baking sheet and cover with tin foil. Refrigerate at least two hours.
To serve, unmold if desired by dipping the ramekin base in hot water then drying and inverting onto a plate. Otherwise, you can serve directly in the ramekins. Drizzle about 2 tablespoons of the bourbon brown sugar syrup on each portion.
Makes 6-8 servings.